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2 Sheets-Sheet 1. J. MASON.

(N0 Model.)

GATE.

Patented Apr. 24,1894.

m: NATIONAL umoamapmm: coMPANY.

{No Model.) J MASON 2 Sheets-Sheet 2.

. GATE. No. 518,743. Patented Apr. 24, 1894.

UNITED STATES PATENT OFFICE.

JOHN MASON, OF PETALUMA, CALIFORNIA.

GATE.

SPECIFICATION forming part of Letters IPatent No. 518,743, dated April24,1 894.

Application filed July 26, 1893. Serial No. 481,550- (No model.)

To aZZ whom it may concern:

Be it known that 1, JOHN MASON, a citizen of the United States, residingat Petaluma, Sonoma county, State of California, have invented anImprovement in Gates; and I hereby declare the following to be a full,clear, and exact description of the same.

My invention relates to that class of gates in which a variable orswinging pivot is employed for the inner upright of the gate, throughthe movement of which, the gate is first tilted to relieve it of itslatch, and is then adapted to swing by gravity to an open or closedposition.

My invention consists in the novel construction and arrangement of thevariable pivot, and the means for operating it, which I shallhereinafter fully describe.

The object of my invention is to provide means for easily andeffectively operating a gate through power transmitted from cranks inthe roadway, adapted to be run down by the wheels of a passing vehicle,said means being of simple and economical construction, not liable toget out of order, and adapted to be operated by the exercise of smallpower.

Referring to the accompanying drawings for a more complete explanationof my invention,.-Figure 1 is a perspective view of my gate. Fig. 2 is aplan. Fig. 3 is a vertical cross section of the pulley F. Fig. 4: is adetail showing the connection of spring N with the cam I.

A is the road-way, at one side of which is the hinge post B, and at theother side is the latch post 0. To the former is secured, near its top,the bracket 12, having at its inner extremity the vertical pin 12.

D is the gate, having the inner upright d, to which, near its top, issecured the socketed bracket 01' which fits down freely over and is thushinged upon the pin b. The other upright d of the gate has a springcontrolled latch d which engages a catch 0 on the latch post 0, in theordinary manner. Beside the road is a post E having a catch 6 with whichlatch d engages when the gate is open.

F is an open-bottom hollow pulley centrally pivoted by a pin or boltsaid pulley lying in a horizontal plane and adapted to oscillate over. asuitable foundation plate .R on which is a fixed stop r with which lugsr on the pulley come in contact to limit its 0scillation. This pulley isprovided near its rim on one side with a vertical pin Gr, upon which isfitted the socketed bracket (1 secured to the lower end of the innerupright cl of the gate.

In the road-way, at a suitable distance from the gate, is a crank H, theend of the shaft h of which has secured to it the double cam I, thefaces of which are grooved in order to guide the chains or cables. Oneof these chains J is secured to the upper rear extremity of the cam, andthe other K is secured to the lower rear extremity. The chain J hasconnected with it a wire j, the other end of which joins a chain J whichis secured to the pulley F at the point f. The chain K has connectedwith it a wire 7c, the other end of which joins a chain K which issecured to pulley F at the point f which point is opposite to that atwhich the chain J 'is attached. Similarly, on the other side of thegate, in the road-way, is a crank 11, the shaft h of which carriesadouble cam I" to which are secured at opposite extremities the chains Land M. The former chain L, joins a wire Z, which is connected with achain L attached to pulley F at f and the chain M has a wire on,connected with a chain M, attached to pulley F at f.

The spring for returning and controlling the crank shafts and their camsis constructed and arranged as follows: It is a coil spring N, fitted toencircle the shaft, just within the cam. It

has one end 11. which projects upwardly and bears against a pin 0 on thecam. It has another end 91. which extends downwardly and bears againstanother pin 0 on said cam, the bearings in the two instances beingopposite. These free ends at and n of the spring are limited in theirreturn by fixed stops 1) and p, the former of which is cast with theboxing cap P of the shaft, and the latter projects from said boxinglower down. Suitable covers, which it is unnecessary to show, will befitted over the cams.

The operation of my gate is as follows: Suppose a vehicle approach fromthe side on which the crank H is located. The wheel runs down thiscrank. This causes the cam I to turn downwardly,-and thereby to pullupon the connections K 7.: K, whereby the pulley F is oscillated and itspin G moved forward, which has the immediate effect of tilting the latchend of the gate upwardly in a vertical plane, and this lifts the latchfrom the catch. Continued movement of the pulley F carries its pinthrough an arc or a circle, which has the effect of throwing the lowerhinge out of the perpendicular plane of the upper hinge, whereby the nowfree gate will swing open by gravity, until its latch en-j gages thecatch on the side post E, and in this pos1tion the two hinges will againbe in the same vertical plane. As soon as the vehicle wheel leaves thecrank H, the latter will.

spring back to a vertical position under the influence of the lower endn of spring N, bearing on the pin 0 of the cam I, and said end islimited by the lower stop 10. When the vehicle has passed the open gate,its wheel runs down the crank H which will turn its cam I backwardly andthrough the connections L,

l, L, the pulley F will be returned, with the ate it, and to start thegate; then as thelonger leverage of the cam comes into action, the powerof the crank is eased up as the gate opens. It is also to be noted thatthe entire pull of the connections is directed Wholly upon the gate, byreason of the parts being freeof the fixed hinge post, thereby renderingthe operation of the gate much easier.

Having thus described my invention, what Iclaim as new, and desire-tosecure by Letters Patent, is-

1. The gate having the stationary hinge connection above, in combinationwith the horizontally oscillating pulley F with its pin forming avariable hinge connection below, said pulley having an open bottom andprovided with the lugs r on its inner surface; the foundation plate R onwhich the pulleyF oscillates, said plate having the fixed stop 7' withwhich the lugs 0 come in contact to limit the oscillation of the pulley;and means for oscillating said pulley to throw the hinge connections outof the same perpendicular plane whereby the gate swings by gravity,substantially as herein described.

2. The swinging gate having the stationary hinge connection above, andan oscillating pulley with a pin forming a variable connection for thegate below, in combination with cranks in the roadway; the double orpointed cams on the crank shafts, and fixed thereon so that their pointsextend in a plane at right angles to the plane of the cranks; and thechain connections from said arms to the oscillating pulley,substantially as herein described.

3. In a gate, the crankshaft having thecam with connections to operatethe gate, in combination with the coil spring N, on the shaft justwithin the cam, said spring having the ends it and n'the pins 0 and 0'on the cam side against which said ends bear oppositely; the fixed stop19 on the boxing cap of the cam shaft for limiting the return of thespring end '11,, and the lower fixed stop 19' on the boxing, forlimiting the return of the spring end at, substantially as hereindescribed.

In witness whereof I have hereunto set my hand.

JOHN MASON.

Witnesses:

S. H. N OURSE, J. A. BAYLESS.

